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SHAREHOLDERS' EQUITY AND NONCONTROLLING INTERESTS Noncontrolling Interest (Details) (USD $) | 0 Months Ended | 3 Months Ended | 12 Months Ended |  |  | 12 Months Ended |  | 12 Months Ended |  |  |  |  | 12 Months Ended
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Nov. 29, 2011 | Dec. 31, 2011 | Sep. 30, 2011 | Jun. 30, 2011 | Mar. 31, 2011 | Dec. 31, 2010 | Sep. 30, 2010 | Jun. 30, 2010 | Mar. 31, 2010 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009 | Dec. 31, 2011 LTIP Units [Member] | Dec. 31, 2010 LTIP Units [Member] | Dec. 31, 2010 Klaff [Member] Restricted Stock [Member] | Dec. 31, 2005 Klaff [Member] Restricted Stock [Member] | Dec. 31, 2011 Series A Preferred Stock [Member] | Dec. 31, 2011 Noncontrolling Interest [Member] | Dec. 31, 2010 Noncontrolling Interest [Member] | Dec. 31, 2009 Noncontrolling Interest [Member] | Dec. 31, 2011 Noncontrolling Interest [Member] Partially-Owned Affiliates [Member] | Dec. 31, 2011 Operating Partnership, as General Partner or Managing Member [Member] | Dec. 31, 2010 Operating Partnership, as General Partner or Managing Member [Member] | Dec. 31, 2011 Operating Partnership, as General Partner or Managing Member [Member] Series A Preferred Stock [Member] | Dec. 31, 2010 Operating Partnership, as General Partner or Managing Member [Member] Series A Preferred Stock [Member] | Dec. 31, 2011 Operating Partnership, as General Partner or Managing Member [Member] Noncontrolling Interest [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance |  |  |  |  | $ 269,310,000 |  |  |  |  | $ 269,310,000 |  |  |  |  |  |  |  |  |  |  | $ 264,901,000 |  |  |  |  | $ 4,409,000
Distributions declared of $0.72 per Common OP Unit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 |  |  |  |  | (984,000)
Distributions declared | $ 0.18 | $ 0.18 | $ 0.18 | $ 0.18 | $ 0.18 | $ 0.18 | $ 0.18 | $ 0.18 | $ 0.18 | $ 0.72 | $ 0.72 | $ 0.75 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income for the period January 1 through December 31, 2011 |  |  |  |  |  |  |  |  |  | 2,160,000 | 20,610,000 | (18,427,000) |  |  |  |  |  |  |  |  | 1,508,000 |  |  |  |  | 652,000
Conversion of 11,569 OP Units to Common Shares by limited partners of the Operating Partnership |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (56,000) | (3,240,000) | (90,000) | 0 |  |  |  |  | (56,000)
Issuance of LTIP Unit awards to employees |  |  |  |  |  |  |  |  |  | 2,441,000 |  |  |  |  |  |  |  | 2,441,000 |  |  | 0 |  |  |  |  | 2,441,000
Other comprehensive income - unrealized loss on valuation of swap agreements |  |  |  |  |  |  |  |  |  | (5,611,000) | (2,683,000) | (1,052,000) |  |  |  |  |  | (2,150,000) | (354,000) | (140,000) | (2,102,000) |  |  |  |  | (48,000)
Reclassification of realized interest on swap agreements |  |  |  |  |  |  |  |  |  | 3,081,000 | 2,749,000 | 2,745,000 |  |  |  |  |  | 676,000 | 283,000 | 319,000 | 648,000 |  |  |  |  | 28,000
Noncontrolling Interest contributions |  |  |  |  |  |  |  |  |  | 117,945,000 | 33,556,000 | 25,653,000 |  |  |  |  |  | 117,945,000 | 33,556,000 | 25,653,000 | 117,945,000 |  |  |  |  | 0
Noncontrolling interest distributions and other reductions |  |  |  |  |  |  |  |  |  | (7,697,000) | (2,892,000) | (1,624,000) |  |  |  |  |  | (7,697,000) | (2,892,000) | (1,624,000) | (7,697,000) |  |  |  |  | 0
Employee Long-term Incentive Plan Unit Awards |  |  |  |  |  |  |  |  |  | 4,032,000 | 3,838,000 | 3,847,000 |  |  |  |  |  | 3,550,000 | 1,778,000 | 890,000 | 0 |  |  |  |  | 3,550,000
Balance |  | 385,195,000 |  |  |  | 269,310,000 |  |  |  | 385,195,000 | 269,310,000 |  |  |  |  |  |  |  |  |  | 375,203,000 |  |  |  |  | 9,992,000
Share-based Compensation, Units Outstanding |  |  |  |  |  |  |  |  |  |  |  |  | 1,061,564 | 641,534 |  |  |  |  |  |  |  |  |  |  |  |
Series A Preferred OP Units |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 279,748 | 281,294 | 188 | 188 |
Limited Partners' Capital Account, Value Per Unit |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,000 | $ 1,000 |
Per Unit Conversion Amount, Series A Preferred OP Units |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 22.50 |  |  |  |  |  |  |  |  |
Per Unit Conversion Annual Rate, Series A Preferred OP Units |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 9.00% |  |  |  |  |  |  |  |  |
Units issued for interest in contractual rights (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 250,000 |  |  |  |  |  |  |  |  |  |
Units issued for interest in contractual rights, converted (in shares) |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 250,000 |  |  |  |  |  |  |  |  |  |  |
Limited Partners' Capital Account, Units Issued and Converted |  | 11,569 |  |  |  |  |  |  |  | 11,569 |  |  |  |  |  |  | 1,392 |  |  |  |  |  |  |  |  |
Share-based Compensation, Units converted from Series A Preferred OP Units |  |  |  |  |  | 185,600 |  |  |  |  | 185,600 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Denominator for Series A Preferred OP Unit Conversion |  | $ 7.50 |  |  |  |  |  |  |  | $ 7.50 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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